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authorAndrey Smirnov <andrew.smirnov@gmail.com>2018-07-17 07:33:29 +0300
committerMark Brown <broonie@kernel.org>2018-07-17 14:56:49 +0300
commit5f8f80356eccfaae1db8a827626ae4fc2eb62831 (patch)
tree1e69cc119ba4d1b480fa0bcd6ee11a278cdd55c2 /drivers/spi
parent504f2565a4f64a3cdd0a4e175a34ffc73297294a (diff)
downloadlinux-5f8f80356eccfaae1db8a827626ae4fc2eb62831.tar.xz
spi: spi-fsl-dspi: Fill actual_length when doing DMA transfer
Upper layer users of SPI device drivers may rely on 'actual_length', so it is important that information is correctly reported. One such example is spi_mem_exec_op() function that will fail if 'actual_length' of the data transferred is not what was requested. Add necessary code to populate 'actual_length. Cc: Mark Brown <broonie@kernel.org> Cc: Sanchayan Maity <maitysanchayan@gmail.com> Cc: Stefan Agner <stefan@agner.ch> Cc: cphealy@gmail.com Cc: linux-spi@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-fsl-dspi.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
index 89a1e7a4fe5d..9e598642ca66 100644
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -358,6 +358,7 @@ static int dspi_dma_xfer(struct fsl_dspi *dspi)
{
struct fsl_dspi_dma *dma = dspi->dma;
struct device *dev = &dspi->pdev->dev;
+ struct spi_message *message = dspi->cur_msg;
int curr_remaining_bytes;
int bytes_per_buffer;
int ret = 0;
@@ -377,8 +378,10 @@ static int dspi_dma_xfer(struct fsl_dspi *dspi)
goto exit;
} else {
- curr_remaining_bytes -= dma->curr_xfer_len
- * dspi->bytes_per_word;
+ const int len =
+ dma->curr_xfer_len * dspi->bytes_per_word;
+ curr_remaining_bytes -= len;
+ message->actual_length += len;
if (curr_remaining_bytes < 0)
curr_remaining_bytes = 0;
}